Studied by 2 peopleRadioactive decay
________ is the process by which an unstable atomic nucleus loses energy by radiation.
Beta decay
________ occurs when in a nucleus with too many protons or neutrons, one of the protons or neutrons gets transformed into the other.
alpha particle
When a(n) ________ is emitted from a nucleus the nucleus loses two protons and two neutron.
Becquerel
________- Unit of activity which is 1 decay per sec.
Geiger Muller
The instrument used to detect the effects of radiation is called the ________ tube (can detect and measure radiation)
Neutrons
________ have a charge of 0 and a mass of 1.
Protons
________ have a charge of +1 and a mass of 1.
Ionisation
________- Atoms that have become charged by their electrons being knocked of by radiation.
Gamma radiation
________ is part of the EM spectrum; a wave with a very high frequency and a very short wavelength.
Gamma rays
________ are used to sterilise syringes because ________ are penetrating but as well as this ________ kill viruses and bacteria.
alpha source
It is more dangerous to eat food contaminated with a(n) ________ as it is more ionising.
Geiger Muller Tube
Count rate is the number of decays actually recorded per second by detector (ex: ________)
Peer review
________- data published and checked by other scientists.
Beta radiation
________ is a fast moving high energy electron, and is called a beta particle.
high speed
It is the nucleus of a helium particle and travels at a very ________.
Half life
________- How long it takes for half the nuclei to decay.
atom
A(n) ________ decays into a new atom by changing a neutron into a proton and an electron.
atom
A(n) ________ decays into a new atom by and emits alpha particle.
Half life
________- the time it takes for half the nuclei to decay.
Gamma radiation
________ is a high energy electromagnetic radiation with an electric charge of 0 and a relative atomic mass of 0.
There are three main types of radiation
Gamma, Beta and Alpha
Radioactive decay
becoming stable
Count rate is the number of decays actually recorded per second by detector (ex
Geiger-Muller Tube)
Half-life
the time it takes for half the nuclei to decay
Irradiated
when an object has been exposed to ionising radiation
Ionisation
Atoms that have become charged by their electrons being knocked of by radiation
Peer review
data published and checked by other scientists
Count rate
the number of counts per second on a geiger counter
Half-life
How long it takes for half the nuclei to decay
Becquerel
Unit of activity which is 1 decay per sec
Note 
Flashcard (21)